The OptiDisc finishing and polishing system gives restorations a final polish equal to that of natural dentition. With a three-grit system instead of the traditional four, you can achieve a higher surface gloss with fewer steps. OptiDiscs are translucent for enhanced working surface visibility. OptiDisc Extra-Coarse is for contouring composite restorative materials prior to finishing and polishing. Assorted Kit: 30 Discs of 9.6 mm and 12.6 mm (all Grits), 3 Mandrels Features and Benefits Three-grit system Fewer steps Achieve a high surface gloss